ייִדישער מחשבֿה אויף קהלת 7:14

Regarding "and also this one across from that one did God make": And behold since the Supreme Wisdom decreed that there be good and evil in the world, the arrangement should be that evil truly be found in all the levels in which it is possible to be found, such that man's work be to prevent its domination and activity in all of its ways and levels until its presence be completely removed from all of creation. Of course, you see that the truth of the nature of the Master, blessed be He, is that He is devoid of any type of lack that there may be, as we have written in Part I, Chapter 1 (On the Creator 2). It is only in the creatures that is possible for there to be lacking and evil. So the arrangement was truly that levels of good be created for the creatures and that its opposite - which is evil - [also] be created for them. This was the bringing about of that which can be evil. And man would come through his service and remove its content completely and establish good in himself and in the creation for ever and ever. And hence the arrangement was that for every good thing, there be found an evil thing corresponding to it. And this is that which the verse states (Ecclesiastes 7:14), "and also this one across from that one did God make." And there is only one thing in which good has an advantage over evil: That the root of good is God's primordial and everlasting perfection, whereas evil is something created only in order to nullify it. And its only use is during the time of man's effort that we mentioned above.